Will installing AOFO as part of R3 update prevent install of SQL /Exchange Agents

I am currenlty in the process of updating a number Remote Agent Servers (Server 2008 Ent R2 ) with R3 Backup Exec client. Can anyone confirm whether installing the AOFO feature as part of the update will prevent this install of SQL and Exchange Agent on my SQL and Exchange servers. If this is the case then I am reluctant to go ahead wit the update since I can risk any possible issues /downtime to Production servers

Any feedback /comments/suggestions would be greatly appreciated